stoddie said:I changed mine on a mk 1 172 at 45K just because id bought magnecor leads and thought while i was in there id do them anyways.
You need to take the plastic cover off, then undo the plenum chamber i think its called. You need to also undo the induction hose which connects to your throttle also - sounds complicated but its just a few nuts and bolts.
The plunum chamber lifts off and is sealed by rubber o-rings which locate in slots. On mine they were fine and just lubricated themwith silikone grease. Vaseline would do the trick if you have any of that!! (hee hee!)
Just watch the o-rings when you put the plenum chamber back on so they dont get caught and bolt it back up. Once its on and youve connected everything back up fire her up and listen for any sucking noises coming from that area - shouldnt be any if the jobs done right!
Done that on my car about 6 months and no problems - so i assume i did it right!